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"Blue-green" mealybugs are a group of related mealybug genera whose insides, during adulthood, are usually of the color which gives them their collective name. Alternately, this group may be referred to as blue-black mealybugs. It includes the genera , , , and . While the exact relationships between various scale insects are often contested, one suggestion is to class all (and only) the blue-green mealybugs in the sub-family .